Bump MSAL dependencies to 4.86.1 in central props (#3953)

* Initial plan

* Bump Microsoft.Identity.Client and KeyAttestation to 4.86.1

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

Directory.Build.props

@@ -80,8 +80,8 @@
 
   <PropertyGroup Label="Common dependency versions">
     <MicrosoftIdentityModelVersion Condition="'$(MicrosoftIdentityModelVersion)' == ''">8.19.1</MicrosoftIdentityModelVersion>
-    <MicrosoftIdentityClientVersion Condition="'$(MicrosoftIdentityClientVersion)' == ''">4.86.0</MicrosoftIdentityClientVersion>
-    <MicrosoftIdentityClientKeyAttestationVersion Condition="'$(MicrosoftIdentityClientKeyAttestationVersion)' == ''">4.86.0</MicrosoftIdentityClientKeyAttestationVersion>
+    <MicrosoftIdentityClientVersion Condition="'$(MicrosoftIdentityClientVersion)' == ''">4.86.1</MicrosoftIdentityClientVersion>
+    <MicrosoftIdentityClientKeyAttestationVersion Condition="'$(MicrosoftIdentityClientKeyAttestationVersion)' == ''">4.86.1</MicrosoftIdentityClientKeyAttestationVersion>
     <MicrosoftIdentityAbstractionsVersion Condition="'$(MicrosoftIdentityAbstractionsVersion)' == ''">12.5.0</MicrosoftIdentityAbstractionsVersion>
     <FxCopAnalyzersVersion>3.3.0</FxCopAnalyzersVersion>
     <SystemTextEncodingsWebVersion>4.7.2</SystemTextEncodingsWebVersion>